Auto-Disable Syringe

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Auto-Disable Syringes, which are otherwise referred to as “AD Syringes”, contain internal safety mechanisms, that ensure that after a single use the syringe will not be able to be used a second time. There are several different ways this can be achieved. All of the various Auto-Disable Syringe designs help to prevent the resale and the reuse of medical devices, while promoting overall sanitation and hygiene. The World Health Organization (WHO) is actively campaigning for more countries across the world to start using Auto-Disable Syringes because they additionally dramatically reduce the spread of disease and infection. Combined, these factors make Auto-Disable Syringes the safest injection devices available.


Easy to use and thus need little instruction, training or explanation before use.

Ready to use upon opening and are pre-sterilized which eliminates the need for any other sterilizing equipment.

Limits risk of infection through accidents and thus protect both medical professionals and patients from transmitting blood-borne pathogens such as HIV or Hepatitis B.

Poses the lowest risk of reuse.

Non-toxic (environmentally friendly).


Auto-Disable Syringes have become standard practice in the USA, other countries in the EU and Australia. Africa (specifically Nigeria) are gradually phasing out other syringes and are working towards implementing requirements for health professionals to use Auto-Disable Syringes or some sort of equivalent. Since unsafe injections were listed as the ninth biggest cause of death in 2014, it is imperative that as many countries as possible follow the USA in this endeavor. Price is the biggest factor in the movement to normalize Auto-Disable Syringes, they cost 50% more in comparison to regular syringes. However prices are expected to decrease in the next few years as the World Health Organization (WHO) seeks to subsidize the manufacture and purchase of these syringes.


Auto-Disable Syringe: This kind of syringe can only be used once due to an internal mechanism that blocks the barrel in the syringe when used the first time, which prevents further use from occurring.

Breaking Plunger Syringe: A syringe that can only be used once, in this case it is because when the plunger is depressed an internal mechanism cracks the syringe which renders the syringe useless after its first injection.

Luer Lock Syringe: This connects the needle to the syringe using a system that is leak free. It allows for the needle to be securely attached to the syringe, and ensures that the syringe can be disposed of in an eco-friendly way, without needing to remove the needle.

Luer Slip Syringe: Like the Luer Lock, the Luer Slip prevents leaks from occurring. Instead of screwing the needle onto the syringe, simply slips the needle onto the syringe. This makes it preferable for administering thinner solutions.

Needlestick Prevention Syringes: In this type of syringe, a cap slides over the needle once it has performed an injection, which ensures that the needle cannot accidentally “stick” anyone else. These kinds of syringes also come with a reuse prevention feature.

Retractable Syringes MANUAL: These types of syringes allow for the needle to be manually withdrawn back into the barrel of the syringe. Manual Retractable Syringes are usually the favored type of retractable syringe because they are easier to handle.

Retractable Syringes SPRING LOADED: This type of syringes is similar to the Manual Retractable Syringe; however the needle is withdrawn back into the barrel via a spring. This can cause splattering to occur, where blood and/or fluids can spray off the Cannula. Spring Loaded Retractable Syringes are generally the less favored type of retractable syringe because the spring offers resistance.


How many times can I use an Auto-Disable Syringe?
Once. That way, you decrease the chance of spreading disease and ensure a sterile environment for vaccinations to occur in.
How do Auto-Disable Syringes prevent the spread of infectious diseases?
Infectious diseases are spread by sharing needles and syringes. Because Auto-Disable Syringes are only able to be used a single time, they eliminate the possibility of sharing needles between patients. Thus, infectious diseases cannot be spread.
Do the needles in Auto-Disable Syringes come off?
There are various types of Auto-Disable Syringes with different measures put in place to ensure they are rendered useless after their first usage. Some include the needles snapping off and some do not.
What is the difference between a 2 bit and a 3 bit syringe?
A two bit needle is made up of two parts, the barrel and the plunger. It is formed so that the plunger fits into the barrel perfectly. A three bit needle has an extra component, which is a rubber plunger cap, which forms a better seal between the plunger and the barrel. Three bit syringes tend to have a smoother feel and this is why they are the more common form of syringe.
What is the difference between sterile, pyrogenic and non-pyrogenic needles?
Sterile needles are needles that have already been sterilized by the company that manufactured them. Non-toxic needles can be disposed of in an environmentally friendly way.
Non-pyrogenic needles are needles that won’t cause inflammation or fever responses in patients.
Does the World Health Organization (WHO) endorse Auto-Disable Syringes?
Yes. In fact the WHO is actively trying to get more countries to use Auto-Disable Syringes. The WHO hopes to eventually phase out all other types of syringes.
What is Indelible Ink?
Ink that cannot be washed off or erased.
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